We are one of the leading manufacturer of stainless steel seamless tubes, used for heat exchanger, boiler, high pressure vessel, etc . Except this, Zhongda can produce 6mm-640mm OD, 0.5mm-45mm wall thickness seamless pipes. If you need prime class quality stainless steel seamless tube&pipe, please send your inquire to us. we are looking forward to cooperation with you *****. * Product Name: Stainless Steel Seamless Tube & Pipe * SPECIFICATION:ASTM A213/A213M, ASTM A269, ASTM A312/312M, ASTM A789/A789M, ASTM A790/A790M，ASME SA213/SA213M, ASME SA312/SA312M, ASME SA789/SA789M, ASME SA790/SA790M，JIS G3459, JIS G3463，DIN17456, DIN17458, EN 10216-5. * MATERIAL: TP304, TP304L, TP304H, TP310S, TP316, TP316L, TP317L, TP321, TP321H, TP347H, UNS S31803, UNS S32205, UNS S32750, SUS304 TP, SUS304L TP, SUS316L TP, SUS321 TP, SUS347 TP, 1.4301, 1.4307, 1.4541, 1.4401, 1.4404, 1.4571, 1.4462, 1.4424, 1.4507 *Outside Diameter: 6mm-640mm *Wall Thickness: 0.5mm-45mm